Disclosure: I’d like to thank EarFun for sending me the Air Pro 4 for this review. All thoughts and opinions are my own, and EarFun had no say or input on the contents of this review.

The EarFun Air Pro 4 aims to disrupt the budget TWS earbuds market by offering features typically reserved for premium models at just $89.99. While most Bluetooth earbuds in this price range cut corners on codec support or battery life, the Air Pro 4 comes packed with aptX Lossless and LDAC support, along with impressive 52-hour total playtime. That’s a bold statement in a market where premium features usually command premium prices.

What excited me about the Air Pro 4 isn’t just the spec sheet, though. The earbuds include essentially all of the practical features like multipoint connectivity, Game Mode, EQ support, and a companion app, that you would expect from higher-end products.

I’ve been testing these earbuds for daily use across multiple devices and environments to see if they deliver on their promises. The big question isn’t whether these earbuds have an impressive feature list (they clearly do) but whether the actual performance lives up to the marketing claim. Can a sub-$100 pair of earbuds really compete with models costing twice as much? Let’s get into the review and find out.

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• EarFun Air Pro 4
• Charging case
• USB-C  to USB-A cable
• XS, S, M ,L ear tips
• Ear tip cleaner
• Manual

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The Air Pro 4 features an in-ear design with relatively short stems that follow the now-familiar Apple-inspired aesthetic, though EarFun adds distinctive angular accents that provide some visual differentiation. The touch-sensitive buttons are just the right size and are located on the very top of the stem. This a great design as it allows you to comfortably handle the earbuds without accidentally pressing the buttons, an issue I have with almost every TWS earbud. The buttons respond well to deliberate taps while avoiding most accidental activations.

I found the fit to be very secure and comfortable. I never had to twist or push the earbuds too hard into my ear to get a solid and comfortable seal. Compare that to the Apple AirPods Pro, where I can never manage to get a secure fit, regardless of the ear tips I use. The Air Pro 4 earbuds are also very light at just 5 grams, I never felt like I had anything in my ear weighing them down. Even while running outside or moving around, I never felt like the earbuds would come loose; they stayed in place and maintained the seal.

The Air Pro 4 is rated for IPX5, which protects against sweat and light rain. This is sufficient for workouts and daily use in various weather conditions. While it falls short of the IP67 rating found on some premium models, the protection level is appropriate for the price point and intended use cases, and in all honesty, it will be just fine for most people.

The EarFun Air Pro 4 makes a strong impression with its compact charging case. The case is just slightly taller and a bit thicker than that of Apple’s AirPods Pro, and weighs a mere 46g with earbuds inside. The charging case features a matte-finish plastic construction with a subtle reflective EarFun logo on top. Despite the budget-friendly price tag, the case feels surprisingly solid in hand, with a magnetic lid that closes with a satisfying snap.

The USB-C port on the back handles wired charging, while Qi wireless charging support adds convenience that is rarely found at this price point. On the front of the case, LED indicators provide clear battery status information through different colored lights. Inside the case, the earbuds snap into place securely via magnets, and the overall placement of them makes them very easy to take out and insert back inside. A white LED light on each side of the case illuminates the earbuds, serving as both a guiding light and an indicator for pairing status. Inside is also a button to activate manual pairing. The whole experience here feels not only premium but thoughtful and intentional.

The case is mostly pocket-friendly. I say mostly as it fits just fine in coat pockets and small bags, even hoody pockets, but it does create a slight bulge in my jean pockets. Those who wear very baggy jeans or pants will have a better time than I. The case is infinitely better than the charging case for Sennheiser’s Momentum True Wireless 4 earbuds, though, but nowhere near as slim as Apple’s AirPods Pro case.

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The EarFun Air Pro 4 is extremely easy to set up and start using, especially if you are using an Android device. They support Google Fast Pair, which means once you open the charging case, your Android device will detect it and prompt for pairing. On my Samsung Galaxy Fold 5, it was as easy as that. For iOS devices, like my 2020  iPad Pro 11”, as well as Windows and MacOS, you need to manually pair the earbuds, which I had no issues doing for both my iPad and my Windows 11 desktop and laptop.

Once you have the earbuds paired and inserted in your ears, you can use the capacitive buttons on each earbud for volume control, playback control, switching through the various noise control options, activating your device’s voice assistant, as well as enabling or disabling Game Mode. This is all done through one tap, two taps, three taps, or a long press. The controls can be entirely customized to your liking through the companion app (we’ll get to that in a bit) or disabled. The controls themselves are extremely responsive, and I never felt like I had to wait for them to process the action like on so many TWS earbuds (I’m looking at you, Sennheiser).

There is also in-ear detection for both earbuds, and it’s very fast and responsive. In fact, it works exactly like Apple’s AirPods, so if you’re used to that experience, you will feel right at home here.

The Air Pro 4 also supports multipoint connections, meaning you can have it paired with up to two devices at the same time. This is extremely helpful in situations where you have them paired to your laptop, but want to change the EQ profile with the app on your phone. This is all possible and extremely convenient, as it also allows you to see in the app the currently used Bluetooth codec, helpful for us audiophiles to see that LDAC or aptX Lossless is actually being used.

Given the number of features and options to configure in the companion app and the customization of the controls, the learning curve for using the Air Pro 4 can feel a little steep. Thankfully, it didn’t really take that much time to set them up for what works best for me and my daily routine. I was able to get the hang of the controls after a couple of listening sessions, and once I customized everything how I wanted it, it was just set and forget. I didn’t even encounter any bugs or glitches in my daily use, which feels rare these days for electronic products.

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The Air Pro 4 utilizes QuietSmart 3.0 Hybrid ANC technology, capable of reducing ambient noise by up to 50dB according to EarFun. Unlike typical budget offerings with basic on/off ANC, these earbuds provide five distinct noise cancellation modes to suit different environments and use cases:

• Strong ANC
  • Provides the most amount of noise cancellation
• Balance ANC
  • Slightly less noise cancellation, for those who find the feeling of the highest ANC mode uncomfortable
• AI Environment Adaptive ANC
  • Adjusts the noise cancellation amount depending on the ambient noise levels around you
• AI Ear Adaptive ANC
  • Adjusts the noise cancellation amount depending on the amount of ambient noise that reaches your ear canal
• Wind Noise cancelling
  • For listening to the earbuds in a windy environment

In my testing, the Strong ANC mode performs impressively well, effectively eliminating consistent low-frequency noises like air conditioners and fans. Sounds like keyboard clicks, voices, and sirens still came through partially, but were very toned down.

What I found particularly useful is the dedicated Wind Noise Canceling mode. It does a respectable job minimizing wind interference without compromising overall noise reduction or sound quality, and was effective whether I was walking my dog outside or going for a run.

The Air Pro 4 has two Ambient (Transparency) modes:

• Default
  • Slightly boosts environmental sounds, making them sound louder than they would be without wearing the earbuds
• Natural
  • Allows some ambient noise in

I found the Natural Ambient mode to be preferable as it mostly sounded, well, natural. I was still able to listen to music while hearing audio queues around me, from cars, cyclists, dogs, and voices. There is a bit of extra white noise compared to higher-end products from Apple, Sony, and Sennheiser, but at this price, I think the ambient mode does a good enough job.

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Connectivity options exceed expectations here. The EarFun Air Pro 4 uses Bluetooth 5.4 and features codec support for essentially all modern codecs: SBC, AAC, aptX, aptX Adaptive, aptX Lossless, and LDAC.

The Air Pro 4 also incorporates LE Audio technology with LC3 codec support and Auracast Bluetooth broadcast capability. They are of limited use right now as many devices don’t support these features, but it’s great to see this level of future proofing.

The Bluetooth 5.4 implementation offers a theoretical range of 15 meters in open spaces. However, real-world performance always varies depending on many environmental factors that can cause interference. I experienced occasional connection hiccups when walls or other obstacles came between the earbuds and my source device, which is typical for most Bluetooth earbuds. As well, depending on the source device, using aptX Lossless and LDAC, I sometimes encountered static and audio stutters. This was usually resolved by turning on airplane mode while keeping Bluetooth enabled on the source device (in my case, one of the many DAPs I use for testing).

With LDAC, setting the connection option on the source device to prefer connection over sound quality also helps. While high bitrate codecs like LDAC and aptX Lossless are the most susceptible to environmental interference, the majority of the time, I was able to use them without issue. Also note that, with the LDAC connection, multi-device pairing is disabled to ensure a stable Bluetooth connection.

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This mode enables a low-latency connection that is intended to be used for watching videos and playing games. The one limitation it has is that it cannot be used with LDAC. Otherwise, it works with the other codecs. This mode needs to be toggled on using the companion app, or you can configure the touch button to enable it (I set my right earbud’s long press to enable/disable it).

I tried game mode with my Android phone, Windows 11 desktop, and Surface Laptop 7. It works very well, and I can almost play competitive games with this mode enabled. There is a very slight delay, and if you are the type of person who is sensitive to audio/video latency, then this probably won’t help you, but otherwise, this is the best you are going to get without moving to a wired connection. For single-player games, this works perfectly fine, though. For watching podcasts, YouTube videos, and movies, it works extremely well, and the audio syncs up quite nicely. EarFun did a good job implementing this.

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The companion app, called “EarFun Audio”, is honestly great. It’s reasonably fast and fluid, options are clear and well laid out, and you can even create a profile to sync settings across multiple devices. This is very handy if you create custom EQ profiles, so that you can take them with you if you switch between mobile devices.

The app displays the Bluetooth codec currently in use at the very top, along with the current battery level. Noise Control modes are below that, followed by the Game Mode and In-Ear Detection toggles.

The EarFun Equalizer is quite extensive. EarFun includes a lot of built-in EQ presets, in fact, maybe too many that really only offer minor sound differences. The EQ presets are not organized in a pleasing way, forcing you to scroll through them. When a preset is selected, you can view the result in the graphic EQ.

What I do like, though, is the My Sound Profile, which guides you through making your own custom EQ profile. It does a good job, as I preferred my own custom EQ to that of any of the presets.

Next, there is the Control Customization, allowing you to disable the controls or completely customize them. I’m actually surprised and very happy to see that you can change every single type of control, giving you the most amount of flexibility.

Next up is the Dual Device Connection screen, which shows you the connection history of paired devices and also allows you to toggle the connection on or off.

Bluetooth Audio Quality is where you can change between aptX and LDAC codecs.

The Microphone Setting allows you to specify which earbud is enabled for microphone use, or leave it on automatic.

Voice Prompt Settings not only allows you to switch between various languages, but also adjust the sound level for the prompts, which is a feature I wish more TWS earbuds would let you do. I always find them too loud, so if I have the option, I always lower the volume slightly.

Lastly, we have the LE Audio/Google Fast Pair settings and the Find Headphones option. These all work exactly as stated, though I don’t currently have a way of testing Auracast.

The EarFun Air Pro 4’s battery is rated for 7.5 hours of playback with ANC on, and 11 hours with ANC off. This goes up to 35 hours with ANC on when using the charging case, and honestly, I can believe it since I had a very difficult time draining the battery for the earbuds and case. After days of extensive use and testing, I managed to get the charging case down to 35% battery. In fact, in the month I have been using the Air Pro 4, I only charged the case twice.

For those times when you need a quick boost, the rapid charging capability comes in handy, with just 10 minutes of charging providing about 2 hours of playback time, perfect for those “oh no, my earbuds are dead and I’m about to leave” moments.

Sound quality is where the EarFun Air Pro 4 truly distinguishes itself from other budget TWS earbuds. After testing these earbuds with a variety of music genres and content types, I can confidently say they deliver audio performance that exceeds expectations for their $89.99 price point. For my musical preferences, I actually think the Air Pro 4 has a better sound profile than that of the AirPods Pro (which costs $150 more), and the Sennheiser Accentum True Wireless (double the price of the Air Pro 4).

The Air Pro 4’s factory tuning aligns remarkably close to the Harman curve, especially in the bass and midrange frequencies. Rather than following the “more bass equals better” approach common in budget earbuds, EarFun has opted for a more balanced, natural sound signature that works well across different genres.

The 10mm composite dynamic drivers handle bass with impressive control. Lower notes have decent weight and impact without overwhelming the midrange or treble. I was particularly impressed with how the Air Pro 4 managed more complex bass passages, reproducing even the lowest notes in progressions that many earbuds in this price range miss entirely. There is some extension in the sub-bass, giving you a nice thump when needed, but it’s never overbearing.

Midrange performance is clear and detailed, with vocals sounding natural and well-positioned in the mix. Male and female vocals both stand out as clear, and instruments are layered and defined. The treble extends nicely without becoming harsh or sibilant, though this is the one area where some listeners might want to make minor EQ adjustments depending on personal preference, as it can sound a little too polite and even toned down, leading to a lack of energy here.

My favorite pairing and way of listening to the Air Pro 4 is with my Sony NW-A306 digital audio player, using the LDAC connection. The Bluetooth LDAC connection was rock solid, and the Sony DAP itself is small and portable, so throwing the earbuds on and going for a walk with the NW-A306 in my pocket was extremely convenient. Given the excellent tuning of these TWS earbuds, this is the perfect synergy for audiophiles.

Overall, the sound quality of the Air Pro 4 is genuinely impressive for the price, offering a balanced, detailed presentation that works well across various music genres. While not quite matching the refinement and detail of premium models from Sony or Sennheiser, they come surprisingly close for a fraction of the cost.

I found the microphone quality performed very well in quiet to moderately loud environments. When in my home office in my apartment, it did not sound boomy, and my voice did not echo. Outside, when walking down the street, with average traffic noise, my wife was able to hear my voice clearly through any background noise. Wind does affect the microphone’s ability to focus on my voice, and at times, I was told it was impossible to hear me. With sirens and construction vehicles, the Air Pro 4 also could not distinguish and isolate my voice very well, so overall I think the microphone does a decent job in most situations, but in those extra noisy scenarios, don’t expect too much.

After spending a month with the EarFun Air Pro 4, I’m genuinely surprised by what $89.99 can get you in 2025. These earbuds bring features typically reserved for models costing twice as much, such as aptX Lossless and LDAC support, and ANC that actually works effectively instead of just existing as a checkbox feature.

The sound quality really impresses most of all, though. The tuning follows the Harman target curve remarkably well, especially in the bass and midrange. While some might want to tweak the treble to get some life and energy from it, the out-of-box sound is balanced and detailed enough to satisfy most listeners. This isn’t the typical bass-heavy tuning that plagues the budget segment, but rather a more mature, refined approach.

Battery performance also exceeded my expectations, even when using ANC for most of the time. And then you have a solid companion app that does almost everything right.

Where does the Air Pro 4 fall short, then? For one, the case could be slimmer to allow it to be more pocketable, as it is still bulky enough to be a bulge in my jeans pocket. The treble performance could also do with some tuning, just to give it a bit of energy and detail. The microphone also needs some improvement for isolating voices in extra noisy environments. It does a good job most of the time, but sounds overwhelmed when too much is going on. Lastly, and this is somewhat minor, but there are too many EQ presets to choose from, and only very minor differences between some of them.

All that being said, for anyone seeking high-quality wireless audio without spending hundreds of dollars, the EarFun Air Pro 4 represents an extremely compelling and attractive choice that’s hard to ignore. They may lack the brand recognition of Sony, Sennheiser, or Apple, but they absolutely deserve attention from both casual listeners and audio enthusiasts searching for exceptional value and great sound quality.

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